Move modules-related attributes out from Window.idl.

Source/modules/webaudio/DOMWindowWebAudio.h

Index: Source/modules/webaudio/DOMWindowWebAudio.h
diff --git a/Source/modules/webaudio/DOMWindowWebAudio.h b/Source/modules/webaudio/DOMWindowWebAudio.h
new file mode 100644
index 0000000000000000000000000000000000000000..7b49e112c76a128493279d9a0f3afcb496fb5f86
--- /dev/null
+++ b/Source/modules/webaudio/DOMWindowWebAudio.h
@@ -0,0 +1,27 @@
+// Copyright (c) 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef DOMWindowWebAudio_h
+#define DOMWindowWebAudio_h
+
+#include "core/frame/DOMWindowProperty.h"
+#include "platform/Supplementable.h"
+
+namespace WebCore {
+
+class DOMWindow;
+
+class DOMWindowWebAudio FINAL : public NoBaseWillBeGarbageCollectedFinalized<DOMWindowWebAudio>, public WillBeHeapSupplement<DOMWindow>, public DOMWindowProperty {
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(DOMWindowWebAudio);
+public:
+    virtual ~DOMWindowWebAudio();
+private:
+    explicit DOMWindowWebAudio(DOMWindow&);
+    DOMWindow& m_window;
+};
+
+} // namespace WebCore
+
+#endif // DOMWindowWebAudio_h
+